Dual-wavelength distributed feedback laser array based on four-phase-shifted sampled Bragg grating for terahertz generation
Yizhe Fan,
Bocheng Yuan,
Mohanad Al-Rubaiee
et al.
Abstract:We propose and experimentally demonstrate a dual-wavelength distributed feedback (DFB) laser array utilizing a four-phase-shifted sampled Bragg grating. By using this grating, the coupling coefficient is enhanced by approximately 2.83 times compared to conventional sampled Bragg gratings. The devices exhibit a stable dual-mode lasing achieved by introducing further π-phase shifts at 1/3 and 2/3 positions along the cavity. These devices require only one stage of lithography to define both the ridge waveguide an… Show more
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